For their 100th release, Hammer Films remade the 1940 cavemen groaner One Million B.C. It would prove to be a roaring box office success, whilst simultaneously making Raquel Welch an iconic poster girl and Ray Harryhausen an even bigger hero.
Plot is slight. Two tribes exist in prehistoric times, the Rock People and the Shell People. The former are more aggressive and basic, the latter more forward and assured. Tumak (John Richardson) of the Rocks and Loana (Welch) wind up together, fighting prejudices and lots of giant beasties! Hooray!